{"id":"S85063427","label":"Hydrogen-ion concentration","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85063427","normalized_label":"hydrogen-ion concentration","broader":["http://id.loc.gov/authorities/subjects/sh85000530"],"aliases":["Hydrogen-ion activity","pH (Chemistry)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85063427","provider":"lcsh","revision":"cd8d713bf1f131ed","taxonomy_revision":"f050b5d4780b1289","title":"Hydrogen-ion concentration","url":"/topics/S85063427","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"288384600978638336","address_version":"morton4x16-v1","coordinates":[0,20,18396,3072],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}